\begin{table}[H]
\centering
\begin{tabular}{lcc}
\hline
                                      & \multicolumn{2}{c}{p value}       \\ \cline{2-3} 
                                      & Two-tailed & One-tailed \\ \hline
Economic cost $>$ Instructions only     & 0.165           & 0.082           \\
Costly abstention $>$ Economic cost   & 0.391           & 0.196           \\
Costly abstention $>$ Instructions only & 0.026           & 0.013           \\ 
Costly abstention and economic cost $>$ Instructions only & 0.022           & 0.011           \\ \hline
\end{tabular}
\caption{Linear hypothesis tests}
\label{tab: linearhyp}
\end{table}